Plug



March 16 1926.

J. S. KORCAK PLUG Filed Nov. 5, 1924 |NvENToR ATTORNEY WITNESS:

Patented Mar. 16, 1926.

rennes garen-r lorries. y

JEREY'S. koRcAx, ory new YORK,Y N. Y. Y

A PLUG- e application ined -Ngvember a, 1924.. sei-iai No'. 747,601.v

To'all 'whom' t may concer/n Y Be 5it known that LJERRY S. Koncan, a

af setfof'lieadf'phone's,.and a loud speaker,`

for usein 1Lconnection with vva singlejack and wliereinthe instrumentsa-re connected in series for simultaneous operation, "there alsoy bei'ng'a ymeans for selectively controlling the instrument so 'that either may be short circuited while the other is, in operation.

Another objecti'sfto vprovide aplug which eliminates objection 'o'f inserting the plug of the head-phonesinto the ljack `when tuning in* ona l"radio lreceiver, vand afterward removing the phoneplug-"and inserting theplugrof thelo'ud speaker. Y e

, -A rfurther object resides inthe constructin o'ffa plug which ris simple V'in construction, -cheap 'of "manufacture and highly etlicient foithe purpose intended. vi With thesefand other objects in view, the inventionv resides in certain-novel construction and ycombination and 'arrangement 'of parts, the essential features of Vwhich are hereinafter fully described, fr are 'particularly pointedout inthe appended claims, andare illustrated in thevac'c'ompan'ying drawing, in wliich:'- i.

. Figure 1 is a perspective view of my yimproved plug.

Figure 2 isa vertical sectional view therethrough:l l i Figure'3is ahori'zontal sectional view on the line 3-3 of Figure 2.'

Figure 4 is a vertical transverse sectional -viewon the line 4-4 of Figure 2.

Figure 5 is a diagrammatic view of my improved plug showing the manner of connecting a pair of acoustical instruments therewith.

Referring more particularly to the drawing, the reference numeral 10 designates my invention in its entirety, and which includes a housing formed of a pair of sections 11 and 12 of suitable insulating material. 'The sections are hollowed out or recessed to snuglyreceive'the parts now to be'desc'ribed. Mounted withinthe housing :is an angular conductor member 13, thelowerend or which is formed with a recess or'socket 14 of 'a 50 suiiicient'depth `to receive the'tip of 'a cord leading to `an acoustical instrument such as ahead phone or loud speaker. The other end of the member `is formed with a sleeve or tubular extension 15 for insertion in a 05 jack. :It kwill `therefore be seen `that the member 13 serves -as one side or leg or 4a circuit when Vthe plug is in co-action with the jacket or a radio receiving'set.

and the leg or the same is spaced lfrom the leg of the other member for -a purpose to be described. "The lower end of the-member 16 is'also formedr with a recess or socket 17 lfor receiving the tip on ythe free end of 4a 7l cord of an acoustical instrument.

sleeve 15 vand the post 18. They head 19, 85

post 18 -and'niember 16 serve 'as the other leg or'side'otl the circuit when'the plug is inserted its .fullv length into the jack.

yPositioned between the ymembers 13 and 16fand kspaced therefro'in'is'a'block or plate 90 23 vprovided `with recesses or sockets 24 and 25Vfor the samepiirposeasthe recessesorl sockets 14 and 17. The'opposite sides ofthe block 23 and the outside of the members 13 and 16 arevrormed with transverse cut-Q95 out portions or grooves 26 which communicate with the respective sockets,-and seated within the respective -grooves 26 are the curvedends 27 on the flat springs 28. *When the tips of the cord of the acoustical instruments are inserted in the recesses, the same will force the flat springs out or the recesses, but the springs have sufiicient tension to hold the pins in binding engagement with the walls of the recesses to form a perfect contact and to prevent the pins from accidentally dropping from the plug.

A T-shaped switch arm 29 is pivoted to the block 23 as at 30, and is provided with a manipulating knob Y 31 which through an arcuate shaped slot 32 in the section 12 of the housing. The members 13 and A second aiigularniember 16 is provided 70 Insulating 80 extends V lo are cut-away as at 33 for receiving the cross head ot the Tshaped switch arm when the knob is moved to opposite ends of the slot for the purpose now to be described. 'lhe switch arm may be formed with an enlarged portieri t'or frictional engagement with `the plug and with the respective angu` lar members when the same is moved into contact therewith.

In practice, two acoustical instrumenta may be connected in series by inserting one ot the cord pins ot each instrument in the respective recesses 14.- and 1T, and the other two cord pins into the respective recesses 52st and 25. llt the i igle member 13 in the block and plate 3 are electrically connected .by moving the switch arm i0 to cause the head to enter the cut-away portion 33 in the menr ber 13, the instrument connected with the member| 13 and the plate 23 will be short circuited as the current would lake the course et least resistance through the sleeve 15, member i3, switch arm 2S) and into the instrument having its cord pins in `the recesses 25 and il", and then up to the head 1E). It however, the switch arm is moved in the opposite direction to bridge the .member 1G and plate :23, the

instrument having its cord tip in the sockets 17 and 25 will be short circuited as the current would then flow through the post 1S, member 1G, switch arm 29, into the instruv ment connected with the sockets 14: and 25, then through the member 13 to the sleeve 15. W'hen the switch arm is in a position so that the knob is midway between the ends of the slot, current will tlow through both instruments. It will therefore be seen that two instruments may be arranged in series, tor operation simultaneously, or either instrument may be rendered inoperative due to the selective contact switch. It desired, the section 1Q of the housing may have suitable indicating indicia thereon for denoting various ositlons ot the switch arm.

T 1e parts 13, 1G, 23 and 29 are constructed of brass or other conducting material, but the switch arm is formed o1" a conductive material oi low resistance in order to short circuit the respective parts oi the plug.

From the foregoing description, it will be seen that I have provided a plug for radio hamaca receiving apparatus in which a pair of acoustical instruments may be arranged in series, whereby both instruments are capable of operation simultaneously, or either instrument may be `rendered inoperative by the opera tion ot a selective switch.

lllhat is claimed as new is 1. A plug ior use in connection with radio receiving apparatus comprising an insulated casing, a pair ojt conductor members arranged in spaced relation with said housing, a socket ttorl'ned in each of said members, a block oft cozulucting material disposed between said members and spaced therefrom, a pair ot sockets in said block, and means ttor selectin-ily bridging the space between said block and said members, said means including a swingingly mounted T-shape arm.

A plug for use in connection with radio receiving apparatus comprisingan insulated casing, a pair ot conductor members ar ranged in spaced relation with said housing, a socket formed in each of `said members, a block oil conducting material disposed between said `memlwrs and spaced therefrom, a pair o1" sockets in said block, and means tor selectively bridging the space between said block and said members, said means including a swinging-ly mounted T-shape arm, a tubular extension formed on one of said members andprojecting from said housinfr, a post on the other of said members extending through said tubular extension and beyond the same, and insulating means between said tubular extension from said post,

8. A` plug :tor use in connection with radio receiving apparatus comprising an insulated casing, a pair of conductor members arranged in spaced relation within said housing, asocket formed in each of saidmembers, a block of conducting material disposed between said members and spaced therefrom, a pair ot socket-s in said block, and means for selectively bridging the space between said block and said members,` said means comprising a pivoted switch arm having a manipulatingknob extending through a slot in onewall of said housing. i

In testimony whereof I have atlixed my signature.

.meer s. Konoanf 

